We can determine number densities and aggregation states using ICS. First, we calculate a 2D spatial autocorrelation function (SACF) for each image in the simulation which we created earlier:These notes are meant to serve as a very brief introduction to the accompanying MATLAB image correlation spectroscopy code. They are not intended to be a comprehensive lesson on the underlying theory of ICS, or an introduction to MATLABAll of the ICS .m files in the unzipped directory should be added to the MATLAB path: File --> Set Path... --> Add with Subfolders... You ll need the Optimization and Image Processing Toolboxes to use all of the included .m files.